D-2 ヨットのキール・バルブ周りに生ずる造波抵抗の低減に関する研究(流体特性)
詳細
While the old yacht used only the drag of the wind, the recent yacht uses the lift force generated by both the sail (wing in the air) and the keel-bulb (wing in the water). When the ship heels, the keel-bulb makes the restoration moment and stabilize it. However, the trailing vortex generated from around the keel bulb is a problem. To solve this problem, it is necessary to know about the trailing vortex. In the wind tunnel experiment using particle image velocimetry (PIV), the flow around the keel-bulb is visualized. As a result, when given the angle of attack to the keel-bulb, the bulb rear end is confirmed two vortex larger in behind it, not only identified a single vortex.
